<h1>Understanding Angular</h1>
<!-- #docregion hello-world-selector -->
<hello-world></hello-world>
<!-- #enddocregion hello-world-selector -->
<hello-world-interpolation></hello-world-interpolation>
<hello-world-bindings></hello-world-bindings>
<hello-world-template></hello-world-template>
<hello-world-ngif></hello-world-ngif>
<hello-world-di></hello-world-di>
